1; RUN: opt -S < %s -instcombine -inline -jump-threading -loop-unroll -unroll-count=4 | FileCheck %s 2; 3; This is a test case that required a number of setup passes because 4; it depends on block order. 5 6target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" 7target triple = "x86_64-apple-macosx10.6.8" 8 9declare i1 @check() nounwind 10declare i32 @getval() nounwind 11 12; Check that the loop exit merges values from all the iterations. This 13; could be a tad fragile, but it's a good test. 14; 15; CHECK: @foo 16; CHECK: return: 17; CHECK: %retval.0 = phi i32 [ %tmp7.i, %land.lhs.true ], [ 0, %do.cond ], [ %tmp7.i.1, %land.lhs.true.1 ], [ 0, %do.cond.1 ], [ %tmp7.i.2, %land.lhs.true.2 ], [ 0, %do.cond.2 ], [ %tmp7.i.3, %land.lhs.true.3 ], [ 0, %do.cond.3 ] 18; CHECK-NOT: @bar 19; CHECK: bar.exit.3 20define i32 @foo() uwtable ssp align 2 { 21entry: 22 br i1 undef, label %return, label %if.end 23 24if.end: ; preds = %entry 25 %call2 = call i32 @getval() 26 br label %do.body 27 28do.body: ; preds = %do.cond, %if.end 29 %call6 = call i32 @bar() 30 %cmp = icmp ne i32 %call6, 0 31 br i1 %cmp, label %land.lhs.true, label %do.cond 32 33land.lhs.true: ; preds = %do.body 34 %call10 = call i32 @getval() 35 %cmp11 = icmp eq i32 0, %call10 36 br i1 %cmp11, label %return, label %do.cond 37 38do.cond: ; preds = %land.lhs.true, %do.body 39 %cmp18 = icmp sle i32 0, %call2 40 br i1 %cmp18, label %do.body, label %return 41 42return: ; preds = %do.cond, %land.lhs.true, %entry 43 %retval.0 = phi i32 [ 0, %entry ], [ %call6, %land.lhs.true ], [ 0, %do.cond ] 44 ret i32 %retval.0 45} 46 47define linkonce_odr i32 @bar() nounwind uwtable ssp align 2 { 48entry: 49 br i1 undef, label %land.lhs.true, label %cond.end 50 51land.lhs.true: ; preds = %entry 52 %cmp4 = call zeroext i1 @check() 53 br i1 %cmp4, label %cond.true, label %cond.end 54 55cond.true: ; preds = %land.lhs.true 56 %tmp7 = call i32 @getval() 57 br label %cond.end 58 59cond.end: ; preds = %cond.true, %land.lhs.true, %entry 60 %cond = phi i32 [ %tmp7, %cond.true ], [ 0, %land.lhs.true ], [ 0, %entry ] 61 ret i32 %cond 62} 63